My sister's 2006 hummer h3 makes a weird noise, when going about 30 mph, it occasionally makes a grinding noise, happens mostly after crossing the railroad. Kinda sounds like a brrr, and usually goes on for a few seconds. I included the mp3 as an attachment.
I tried it out, and It changes gears well, and no problem braking, or accelerating. My sis got it checked and they said it could be the abs. Though no lights are on either regarding this or traction control are on.
Any ideas on what it could be?